Definitely a bummer for Hulk. At least the stewards were gentle. As for the messiness...yeah. It's actually impressive that they got the starting grid out in a statistically average time, given how many summonses were issued.
What exactly happened? The reasoning in the graphic does not tell me much. I only saw the summary which listed him as second. He seemed having finished his lap before the red flag, no?
The other homie already answered, but if you're interested in more in-depth explanations of these FIA summonses, decisions, and other stuff there is a link on the FIA's website homepage (cookie and downloads warning) that takes you to the F1 official documents archive.